Front face of a concrete block



FIG. 1 is a front view of a front face of a concrete block showing my new design;

FIG. 2 is a perspective view as seen from the upper left thereof;

FIG. 3 is a perspective view as seen from the lower left thereof;

FIG. 4 is a perspective view as seen from the upper right thereof; and,

FIG. 5 is a perspective view as seen from the lower right thereof. 

The ornamental design for a front face of a concrete block, as shown and described. 